A thirty-four billion solar mass black hole in SMSS J2157–3602, the most luminous known quasar

@article{Onken2020ATB,
  title={A thirty-four billion solar mass black hole in SMSS J2157–3602, the most luminous known quasar},
  author={Christopher A. Onken and Fuyan Bian and Xiaohui Fan and Feige Wang and Christian Wolf and Jinyi Yang},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2020}
}
From near-infrared spectroscopic measurements of the Mg ii emission line doublet, we estimate the black hole (BH) mass of the quasar, SMSS J215728.21–360215.1, as being (3.4 ± 0.6) × 1010 M⊙ and refine the redshift of the quasar to be z = 4.692. SMSS J2157 is the most luminous known quasar, with a 3000 Å luminosity of (4.7 ± 0.5) × 1047 erg s−1 and an estimated bolometric luminosity of 1.6 × 1048 erg s−1, yet its Eddington ratio is only ∼0.4. Thus, the high luminosity of this quasar is a… 

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